Why blackberry os 6 browser can't download files over 2gb?

I have a problem, the blackberry curve 9300 why every time I want to download files over 2gb, he immediately completed, and the emerging speed 0 kbps I've tried also with uc browser download, files that I downloaded 4.1 gb he successfully downloaded, but stopped after downloaded 1.99 gb I'm confused, does blackberry os 6 can only download 1.99 gb or ream is maximal 2gb download limit? I also never tried to download on blackberry bold 9780 friends I type, but the result is the same as curve 9300, failed
I'm following the appearance of the browser when downloading files over 2 gb:

I'm not sure what that is, but out of curiosity, why would you need a file that large on your BlackBerry? Do you even have the sufficient space on your SD card? My old BlackBerry only came with a 2gb sd card.

On a more serious note, I honestly don't seem much of a need to download files much over 10 MB myself (covers most songs, pictures, etc.) ; anything larger I would use my desktop/laptop for the download and if I truly must have it on my BB, I will transfer it over USB.

yeah I really liked this download on blackberry extereme me, the files that I download are usually iso file, I tried using the wifi, and the results were the same. I think no problem downloading large files up to size gb origin maintained the temperature, I always put the blackberries I'm on the floor, while on the charger